/* ==========================================================================
   1. TOKENS (variáveis de design)
   ========================================================================== */
:root {
  /* Cores — tema claro */
  --bg: #f5f5f7;
  --surface: #ffffff;
  --text: #1d1d1f;
  --text-muted: #6e6e73;
  --border: #e2e2e7;
  --accent: #f5a623;          /* amarelo-alaranjado (fundos, bordas) */
  --accent-text: #b87500;     /* versão mais escura p/ texto legível no tema claro */
  --accent-hover: #e6951a;
  --accent-soft: rgba(245, 166, 35, 0.16);
  --header-bg: rgba(245, 245, 247, 0.8);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.04);

  /* Tipografia */
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", system-ui, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  /* Espaçamentos e layout */
  --gutter: 1.25rem;          /* margem lateral no mobile */
  --container: 1080px;
  --container-narrow: 760px;
  --section-space: 5rem;
  --radius: 18px;
  --radius-sm: 10px;
  --header-h: 60px;

  --transition: 0.25s ease;
}

/* Tema escuro — preferência do sistema (sem escolha manual) */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0b0c;
    --surface: #161618;
    --text: #f5f5f7;
    --text-muted: #a1a1a6;
    --border: #2a2a2e;
    --accent-soft: rgba(245, 166, 35, 0.16);
    --accent-text: #f5a623;
    --header-bg: rgba(11, 11, 12, 0.8);
    --shadow: none;
  }
}

/* Tema escuro — escolha manual */
:root[data-theme="dark"] {
  --bg: #0b0b0c;
  --surface: #161618;
  --text: #f5f5f7;
  --text-muted: #a1a1a6;
  --border: #2a2a2e;
  --accent-soft: rgba(245, 166, 35, 0.16);
  --accent-text: #f5a623;
  --header-bg: rgba(11, 11, 12, 0.8);
  --shadow: none;
}

/* ==========================================================================
   2. RESET / BASE
   ========================================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
  -webkit-text-size-adjust: 100%;
}

/* Scrollbar fina e amarela, sem trilho visível */
html {
  scrollbar-width: thin;                        /* Firefox / Chrome 121+ */
  scrollbar-color: var(--accent) transparent;
}

::-webkit-scrollbar {                           /* Safari / Chromium antigo */
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-hover);
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

mark {
  background: var(--accent-soft);
  color: var(--accent-text);
  padding: 0 0.3em;
  border-radius: 6px;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.mono {
  font-family: var(--font-mono);
}

/* Link de acessibilidade para pular navegação */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--gutter);
  z-index: 200;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: #1d1d1f;
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  top: 0.5rem;
}

/* ==========================================================================
   3. LAYOUT
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.center {
  text-align: center;
}

.section {
  padding-block: var(--section-space);
  border-top: 1px solid var(--border);
}

.section__title {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 2rem;
}

.section__lead {
  color: var(--text-muted);
  max-width: 560px;
  margin: -1rem auto 1.5rem;
}

/* Título seguido de subtítulo curto */
.section__title--tight {
  margin-bottom: 0.5rem;
}

.section__subtitle {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-text);
  margin-bottom: 1rem;
}

.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

.grid--spaced {
  margin-top: 2.5rem;
}

/* Grid com um único card centralizado */
.grid--single {
  max-width: 560px;
  margin-inline: auto;
}

/* ==========================================================================
   4. COMPONENTES
   ========================================================================== */

/* ---------- Header ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--header-bg);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.header.is-scrolled {
  border-color: var(--border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1rem;
}

.logo {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.95rem;
}

.logo span {
  color: var(--accent-text);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface);
  transition: border-color var(--transition), transform var(--transition);
}

.icon-btn:hover {
  border-color: var(--accent-text);
}

/* Interruptor de idioma (PT ⟷ EN) */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  height: 36px;
  padding: 0 0.6rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  transition: border-color var(--transition);
}

.lang-switch:hover {
  border-color: var(--accent);
}

.lang-switch__label {
  color: var(--text-muted);
  transition: color var(--transition);
}

/* Destaca o idioma ativo */
.lang-switch[aria-checked="false"] [data-lang="pt"],
.lang-switch[aria-checked="true"] [data-lang="en"] {
  color: var(--text);
}

.lang-switch__track {
  position: relative;
  width: 30px;
  height: 16px;
  border-radius: 999px;
  background: var(--accent-soft);
}

.lang-switch__knob {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  transition: transform var(--transition);
}

.lang-switch[aria-checked="true"] .lang-switch__knob {
  transform: translateX(14px);
}

/* Alterna ícones sol/lua conforme o tema ativo */
.icon-sun { display: none; }
:root[data-theme="dark"] .icon-sun { display: block; }
:root[data-theme="dark"] .icon-moon { display: none; }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-sun { display: block; }
  :root:not([data-theme="light"]) .icon-moon { display: none; }
}

/* Botão hambúrguer (mobile) */
.menu-btn {
  flex-direction: column;
  display: inline-flex;
  justify-content: center;
  gap: 5px;
}

.menu-btn span {
  display: block;
  width: 14px;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--transition);
}

.menu-btn[aria-expanded="true"] span:first-child { transform: translateY(3.25px) rotate(45deg); }
.menu-btn[aria-expanded="true"] span:last-child  { transform: translateY(-3.25px) rotate(-45deg); }

/* ---------- Navegação (mobile first: menu suspenso) ---------- */
.nav {
  position: absolute;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 0.5rem var(--gutter) 1rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
}

.nav.is-open {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.nav__link {
  display: block;
  padding: 0.75rem 0;
  font-size: 1rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--text);
}

/* ---------- Botões ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 42px;
  padding: 0.6rem 1.25rem;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 600;
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--accent);
  color: #1d1d1f; /* texto escuro garante contraste sobre o amarelo */
}

.btn--primary:hover {
  background: var(--accent-hover);
}

.btn--ghost {
  background: var(--surface);
  border: 1px solid var(--border);
}

.btn--ghost:hover {
  border-color: var(--accent-text);
}

.link {
  color: var(--accent-text);
  font-weight: 600;
  font-size: 0.875rem;
}

.link:hover {
  text-decoration: underline;
}

/* ---------- Chips / tags ---------- */
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chips--center {
  justify-content: center;
}

.chip {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.35rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  transition: border-color var(--transition), color var(--transition);
}

.chip:hover {
  border-color: var(--accent-text);
  color: var(--accent-text);
}

.chip--sm {
  font-size: 0.68rem;
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
}

/* ---------- Card ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: transform var(--transition), border-color var(--transition);
}

a.card:hover,
.card--hover:hover {
  transform: translateY(-3px);
  border-color: var(--accent-text);
}

/* ==========================================================================
   5. SEÇÕES
   ========================================================================== */

/* ---------- Hero ---------- */
.hero {
  padding-block: 4rem 5rem;
  text-align: center;
}

.hero__quote {
  font-size: clamp(2rem, 8vw, 3.5rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero__author {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 1rem;
}

.hero__bio {
  font-size: clamp(1rem, 2.5vw, 1.15rem);
  color: var(--text-muted);
  max-width: 620px;
  margin: 2rem auto;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.social {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 1.5rem;
  margin-top: 2rem;
}

.social a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 2px;
  transition: color var(--transition);
}

.social a:hover {
  color: var(--accent-text);
}

/* ---------- Sobre ---------- */
.about__text {
  font-size: clamp(1.35rem, 4.5vw, 2rem);
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: -0.01em;
}

/* ---------- Timeline (trajetória) ---------- */
.timeline {
  position: relative;
  margin-top: 1rem;
}

/* Linha vertical da timeline */
.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 21px;
  width: 1px;
  background: var(--border);
}

.timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 1rem;
  padding-bottom: 2.5rem;
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__logo {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-text);
}

.timeline__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.25rem 0.75rem;
}

.timeline__company {
  font-size: 1.1rem;
  font-weight: 600;
}

.timeline__period {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-text);
}

.timeline__role {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.timeline__desc {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ---------- Projetos ---------- */
.project {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.project__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.project__index {
  color: var(--accent-text);
  font-weight: 600;
}

.project__arrow {
  color: var(--text-muted);
  transition: color var(--transition), transform var(--transition);
}

.project:hover .project__arrow {
  color: var(--accent-text);
  transform: translate(2px, -2px);
}

.project__title {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
}

.project__desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  flex: 1;
}

.project__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-top: 0.25rem;
}

/* ---------- Certificação ---------- */
.cert {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
}

.cert__body {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
}

/* Mantém o link sempre na base do card */
.cert__body .link {
  margin-top: auto;
}

.cert__badge {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-text);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
}

.cert__label {
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-text);
}

.cert__title {
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.35;
  margin-top: 0.35rem;
}

.cert__issuer {
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

/* ---------- Vídeos ---------- */
.video {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 1rem;
  align-items: start;
}

.video__icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text-muted);
}

.video__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.video__title {
  font-size: 1rem;
  font-weight: 600;
}

.badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  padding: 0.1rem 0.45rem;
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent-text);
}

.video__tags {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-text);
  margin: 0.15rem 0 0.5rem;
}

.video__desc,
.article__desc {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ---------- Artigos ---------- */
.article {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.article__title {
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.35;
}

.article__desc {
  flex: 1;
}

.article__meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-text);
}

/* ---------- Contato ---------- */
.contact__title {
  font-size: clamp(2.25rem, 9vw, 4rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 2rem;
}

.contact .section__lead {
  margin-top: 0;
  margin-bottom: 2rem;
}

/* ---------- Footer ---------- */
.footer {
  padding-block: 2rem;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   6. ANIMAÇÕES
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* Respeita usuários que preferem menos movimento */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ==========================================================================
   7. RESPONSIVIDADE (mobile first)
   ========================================================================== */

/* Telas muito pequenas: botões ocupam largura total */
@media (max-width: 420px) {
  .hero__cta .btn {
    width: 100%;
  }
}

/* Tablet */
@media (min-width: 640px) {
  :root {
    --gutter: 2rem;
  }

  .grid--2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero {
    padding-block: 6rem 7rem;
  }
}

/* Desktop */
@media (min-width: 900px) {
  :root {
    --section-space: 7rem;
    --gutter: 2.5rem;
  }

  .grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Navegação inline no desktop */
  .menu-btn {
    display: none;
  }

  .nav {
    position: static;
    padding: 0;
    background: none;
    border: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    margin-left: auto;
  }

  .nav__list {
    display: flex;
    gap: 1.75rem;
  }

  .nav__link {
    padding: 0;
    font-size: 0.8rem;
  }
}